Chain driving-belt.



J. B. DUKELOW.

CHAIN DRIVING BELT.

APPLICATION rum) n11.1a, 1008.

982,802; Patented Jan.31, 1911.

JOHN DUKELOW, OF CHICAGO, ILLINOIS.

CHAIN DRIVING-BELT.

I Specification of Letters l atent.

Patented Jan. 31, 1911.

Application filed April 18, 1908. Serial No. 427,808.

citizen of the United States residing at belt.

No. 1197 Wilcox avenue, in the city of Chicago, county of Cook, andState of Illinois, have invented certain new and useful Improvements inChain Driving-Belts, of which the following is a description.

My invention relates to means for transmitting power from one rotatablemember to another; by means of suitably formed sheaves mounted upon themembers and connected by a member cooperating with the peripheries ofthe sheaves.

The object of my invention is to produce a simple, reliable, andefiicient device of the kind described; one adapted, to transmit powerwith the least amount of loss of power and distortion of the drivingmember.

To this end my invention consists in the novel construction, arrangementand combination of parts, herein shown and described and moreparticularly pointed out in the claims.

In the accompanying drawings wherein like or similar referencecharacters indicate like or corresponding parts; Figure 1, is a sideelevation of a section of my improved Fig. 2, is a plan view of thesame. Fig. 3, is a section taken substantially on line 33 of Fig. 2.Fig. 4, is a section taken substantially on line 44 of Fig. 2, andshowing a transverse section of the groove with which my belt is adaptedto. operate. Fig. 5, is an elevation of a slightly-modified form of-mydevice shown in connection with a portion-of a sheave with which it isadapted to coiiperate. .Figs. 6 and 7, are details of the frictionmaterial where a single piece of friction material is used with aplurality of links and where a single piece is used with each linkrespectively.

In the preferred form shown in the drawings, my device consists of aplurality of sheet metal links each comprisin two similar side walls 1-1suitably space from each other and united by a transverse web orconnecting member 2, formed integrally therewith. The side walls 1- 1may be of any suitable form but are preferably curved edgewise toapproximately conform to the arc of the sheave'with which the chain isadapted to cooperate. The ends of the side walls are preferably roundedand provided 'distance between the walls at one with an opening 3,adapted to receive a rivet 4, or other suitable means for pivotallyconnecting the ends of the adjacent links.

In the preferred construction the ends of the side walls adjacent theopenings 3, extend beyond the connecting member 2. These projectingwalls or cars are formed substantially parallel to each other, with thed corresponding to "the distance from o tside to outside of the walls atthe opposite end so that in assembling the links one end of each linkwill fit between the walls of the next adjacent link. The intermediateportion of each side wall is preferably divergent or flared outward fromthe connecting member 2, to correspond to the form of the groove in thesheave with which the link is adaptedto cooperate. The connecting memberor web 2, preferably extendsbetween the central portions of the walls attheir inner edges but does not extend sufliciently toward the ends ofthe link to interfere with the free movement of the links when inoperation.

Any suitable friction material, such for example, as leather, rubber,vulcanite or the like, may be provided to inclose the side walls of thelink and form a friction surface to cooperate with the walls of thegroove in the sheave. This material may consist of a single flexiblemember extending longitudinally of the chain and attached to a pluralityof the links, or a plurality of such members, or if preferred, a singlememher for each link, depending upon the size of the chain and thenature of the service for which the device is intended. In the formshown in Fig. 1 of the drawings, this friction material 5, consists of asingle flexible piece arranged to inclose both side walls of the linksand the webs or connecting members 2, attached to the links only at theconnecting members by suitable means to rigidly maintain the same inposition. In this form .where a singlev flexible piece of frictionmaterial is attached to a number of links I prefer to form an opening 6,through the central portion of the strip positioned at the intersectionof the links to permit free movement between the links. In the preferredform these 0 enings are provided with substantially para lel sides ofsuflicient length to extend across the inner face of the links and withends formed to extendsubstantially to departing from the center of theopening 3, so that when the friction material isattached in positionupon the links the openings 6 will commence at one side substantially atthe center of the rivet connecting thelinks and diverge to the inneredge of the side Wall, thence substantially parallel across the innerface of the link and converging to the cen t'er of the rivet. at theopposite side. Where a separate piece of friction materialis providedfor each link, substantially the same form is employed, the end of eachpiece terminating on a line extending from the centenof the end of eachopening outward.

Any suitable means may be employed to secure the friction material tothe link, and in the preferred form shown a rivet 7, is providedextending through that portion of the friction material upon the face ofthe link, through the connecting member 2, near its center for thispurpose. Also to avoid as far as possible unnecessary Wear upon thefriction material where it bends at the sharp corner of the link ashield 8, is provided formed of any suitable material preferably ofleather, vulcanite, or the like, to cover that portion of thefrictionmaterial inclosing the face of the link and prevent the same from comingin contact. with the sides of the groove of thesheavewith which. thebelt is cotiperating.

In the referred construction the shield 8, is secured in position by therivet 7, above describedextending through both the shield and thefriction material.

WVhen constructed as above described the flaring or divergent portionsof the side walls l1 may be formed to accurately lit the peripheralchannel or groove'in the sheave so that when in operation the shield 8,will not reach the bottom of the groove. In the preferred constructionhowever, I have found it advisable to form the side Walls of the linksslightly more divergent than'the groove in which the same is to operate.When so formed the walls of the links being constructed of resilientmaterial, there is a resilient wedging action between the Walls of thelinks and of the groove in the sheave tending to greatly increase theefficiency of the device. If desired to inlimiting myself structionshown; 7 I

What I claimas ncw anddesire to secure by Letters Patent'is:,=

1. In a' device' ofithekind described, a plurality of similar-links eacla pair of side walls, each other and apart positioned between said sidewalls and connected to one edge of each with the ends jecting beyondsaid part, in combination with a cushion arranged to inclose the sidesand connecting part of each link, and means for attachingsaid cushion tosaid link.

2. In a device of the kind described, a plu rality of similar" linkseach comprising a pair of side walls suitably spaced and laterallydivergent fi'om each other, and a part positioned between said sidewalls and connected to their proximate edges with the end of each sidewall projecting beyond said part, in combination with a cushion arpartof each link, and means for attaching said cushion to said link, 1

In a device of the kind described, aplurailty of similar links eachcomprising a pair of side walls suitably spaced from each other, theends of said side walls being substantially parallel andthe-intermediate portions laterally divergent from each other, and apart connecting said walls at one edge, in combination with a cushionarranged to inclose the sides and connecting part of each link, andmeans for attaching said cushion to said connecting part.

4. I11 a device of the kind described, a plurality of similar links eachcomprising a pair of side walls suitably spaced from each other andprovided with a resilient portion intermediate its ends partiallydetached from said ends and a part positioned between said side wallsconnected to one edge of each, incombination with a cushion arranged toinclose the sides and connecting part of each link, and means forattaching said cushion to said link.

5. In a device of the kind described, a plurality of similar links eachcomprising a pair of side walls suitably spaced from each other andprovided with a resilient portion intermediate its ends partiallydetached crease this resilient action a slot or cut 9, may be providedat each end of the flared the flared portion of the side wall from theparallel portions at its ends thus leaving the flared portion free toadjust itself to the form of the groove with which it is in engagement.

Having thus described my improvement it is obvious that variousimmaterial modifications may be made in my device without the spirit ofmy invention,

from said'cnds, and a part positioned be- J tween, and formed integralwith, said side portion of the s1de wall partially severing walls andconnected to one edge of each with yond said part, in combination with.'acushion arranged to inclose the sides and connecting' part of eachlink,. and meansfor attaching said cushion to said link.

rality of similar links, each comprising a pair of side Walls suitablyspaced from each other, each provided with a resilient porhence I do notwish to be understood as tion intermediate its ends partially severed ofeach side wall prin- 6. In a device of the kind described, a pluto theexact form or con- V 1 comprising sultably spaced from.

ranged to inclose the sides and connecting a the ends of each side wallprojecting betherefrom, and a part connecting said walls at one edge, incombination with a cushion arranged to inclose the sides and connectingpart of each link, and means for attaching said cushion to said link.

7 In a device of the kind described, a plurality of similar links eachcom rising a pair of side walls, suitably spaced rom each other and apart positioned between said side walls and connected to one edge ofeach, with the ends of each side wall projecting beyond said part, incombination with a cushion arranged to inclose the sides and connectingpart of each link, a shield for protecting, a portion of said cushion,and means forattaching said cushion and shield to said link.

8. In a device of the kind described, a plurality of similar links eachcomprising a pair of side walls suitably spaced and laterally divergentfrom each other and a part positioned between and formed integrally withsaid side walls and connected to the proximate edges-of said walls withthe ends of said side walls projecting beyond said part, in combinationwith a cushion arranged to inclose the sides and connecting part of eachlink. and means for attaching said cushion to said link.

9. In a device of the kind described, a plurality of similar links eachcomprising a pair of side walls suitably spaced and laterally divergentfrom each other and each provided with a resilient portion intermediateits ends partially detached from said ends and a part positioned betweenand formed integrally with said side walls and connected to theproximate edges of said walls, in combination with a cushion arranged toinclose the sides and connecting part of each link, and means for atta':l1ing said cushion to said link.

10. In a device of the kind described, a

- plurality of similar links each comprising a portion of said cushion,and means for at- .-tachin said cushion and shield to said conshield forprotecting a portion of said cushion, and means for attaching saidcushion and shield to said connecting part.

12. In adevice of the kind described, a plurality of similar links eachcomprising a pairvof side walls suitably spaced and laterally divergentfrom each other, each provided with a resilient portion intermediate itsends, and a part connecting said walls at their proximate edges near thecenter of each, in combination with a cushion arranged to inclose thesides and connecting part of each link, and a shield attached to eachlink for protecting a portion of said cushion, and means for attachingsaid cushion and shield to said connecting part.

'13. In a device of the kind described, a plurality of similar linkseach comprising a pair of side walls suitably spaced from each other,the ends of said side walls being sub stantially parallel and theintermediate portions laterally divergent from each other, and a partformed integral with said walls connecting the same atone edge, incombination with a cushion arranged to inclose the sides and connectingpart of each link, and means for attaching said cushion to said link.

14. In a device of the kind described. a plurality of similar links eachcomprising a pair of side walls suitably spaced from each other. theends of said side walls being substantially parallel, and theintermediate portions laterally divergent from each other, and a partconnecting said side walls at their proximate edges, in combination witha cushion arranged to inclose the sides and connecting part of eachlink, and means for attaching said cushion to said link.

15. In a device oi the kind described, a plurality of similar links eachcomprising a pair of side walls suitably spaced from each other, theends of said side walls being substantially parallel, and theintermediate portions laterally divergent from each other, and a partconnecting said walls at their proximate edges near the center of each,in combination, with a cushion arranged to inclose the sides andconnecting part of each link, and means for attaching said cushion tosaid connecting part.

16. In a device of the kind described, a plurality of similar links eachcomprising a pair of side walls suitably spacedfrom each other, the endsof said side walls being substantially parallel and the intermediate powtions laterally divergent from each other, each provided with aresilientportion intermediate its ends, and a part connecting said wallsat their proximate edges, in combina 'tion wlth a cushion arranged toinclose the sides and connecting partof each link, and means forattaching sa1d cushion to saidlink.

17. In a device of the kind described, a i

&

plurality of similar linkseach comprising a pair of side walls suitablyspaced from each. oher, the ends of said side walls being substantiallyparallel and the intermediate por divergent from each other,

tions laterally each provided with a resilient portion intermediate itsends and a part connecting said side walls at their proximate edges, incombination with a. continuous cushion extending longitudinally of saidchain arranged to inclose the sides and connecting part of a pluralityof links, and means for attaching said-cushion to each link.

18. In a device of the kind described, a plurality of similar'links eachcomprising a pair of side walls suitably spaced from each other, theendsof said side walls being sub-,

pair of side walls suitably spaced from each other. the ends of saidside walls being substantially parallel and the intermediate portionslaterally divergent from each other,

each provided with a. resilient portion inter-' mediate its endspartially severed therefrom, and a part connecting said walls at theirproximate edges, in combination with a cushion arranged to inelose thesides and conneeting part of each link, a shield attached to each linkfor protecting a portion of said. cushion, and means for attaching saidcushion and shield to said link, I

20. As an article of manufacture a sheet metal link comprising a pair ofside walls suitably spaced and laterally divergent from each other, eachprovided with a resilient portion intermediate its ends partiallysevered therefrom, and a part connecting said walls at their proximateedges.

21. In a device of the kind described, a plurality of similar pivotallyconnected links, a cushion formed vof a strip of friction material, ofsuitable form, to cover both sides and the inner face of a plurality ofsaid links, and provided with a transverse opening for each linkpositioned at the intersection of the several links.

22. The combination with a pulley having a peripheral ch'annelformedwith outwardly duced projecting beyond the webs and adapted to be bentinwardly and pivot-ally united, and a flexible element extending overone edge and the opposite sides of\said chain and bearing against theconverging sides of the grooves, and means for connecting the said websto said flexible element.

23. A transmission belt comprising a plurality of links, each formedfrom a single sheet of metal and comprising spaced sides and anintermediate transverse connecting web of less length than the sides,whereby ears are formed projecting beyond the webs and adapted to bebent inwardly between the same, means for movably connecting the ears ofsaid links,and a flexible element extending over one edge and theopposite sides of said chain, and means for connecting said flexibleelement to said webs.

24. A transmission belt comprising a plurality of links each formed froma single sheet of metal-comprising a body portion having a transverseconnecting web and with a pair of cars projecting from each end, the

cars at one end spaced apart and the ears at the other end compressedinto close relations, with the compressed ears of one link insertedbetween the spaced ears of the next link, pivot pins extendingtransversely through said ears, anda flexible element extending over oneedge and the opposite sides of said chain and connected to said webs.

25. A transmission belt comprising a plurality of links each formed froma single sheet of metal comprising a body portion having a transverseconnecting web and with a pair of cars projecting from each end, theears at one end spaced apart and the ears at the other endcompressedinto close relations and the compressed ears of one linkinserted between the spaced ears of the next link,- pivot pins extendingtransversely through said ears, and a flexible element secured to saidwebs andextending 'over the sides of the links.

In testimony whereof, I have hereunto signed my name in the presence oftwo (2) subscribing witnesses.

JOHN E. DUKELOW.

l/Vitnesses B. CHALMnns, E. WILL np.

